Vacuum-alarm.



L. D. COPELAND.

VACUUM ALARM.

APPLICATION FILED MAR.21,1913.

Patented Deo. 9, 1913.

v mvENToR ATTORNEYS WITNESSES COLUMBIA PLANOGHAPH to.. WASHINGTON. n. c.

LUCIUS D. COPELAND, 0F CAMDEN, NEW JERSEY.

VACUUM-ALARM.

Specification of Letters Patent.

Patented Dec.!),1913.

Application filed March 21, 1913. Serial No. 755,911.

To all 'whom t may concern:

Be it known that I, LUcIUs D. CornnANn, a citizen of the United States,residing at Camden, county of Camden, State of New Jersey, have inventeda new and useful Vacuum-Alarm, of which the following is aspecification.

My invention consists of a device for producing an alarm in vacuumapparatus when the vacuum decreases beyond a certain predeterminedpoint.

It further consists of such a device in which the valve which controlsthe signal is held in its closed position by the suction of the vacuumagainst a predetermined and adjusted opposite pull.

It further consists of other novel features of construction all as willbe hereinafter fully set-forth.

The annexed drawings and the following description set forth in detailone mechanical form embodying the invention, such detail constructionbeing but one of various mechanical forms in which the principle of theinvention may be used.

Said annexed drawing represents a partly diagrammatic and partlysectional view of as much as will illustrate one embodiment of myinvention and its connections.

Referring to the drawings, the reference numeral 1 indicates a vacuumcreating device, such as a turbine or rotary fan, or any other pump orsuction device, which is connected by a pipe, 2, to a vacuum tank, 3. Acylindrical chamber, fi, is suitably supported, and has a head, 5, intowhich a pipe, 6, enters and is connected to the vacuum pipe, and whichhead forms a seat upon its inner side. A valve, 7, fits upon said seatand is secured by a coupling, 8, to the end of a rod, 9, which 1s guidedin a tube, 10, secured at its end in the opposite head, 11, of thecylinder', to extend axially in the latter. Said last-referred to headhas a cylindrical casing, 12, in whichn is a spring, 1B, which bearsagainst the inner end of the reasing and against a nut, 14e, upon thethreaded end of the rod and guided in the casingi In connection with theparts just described, I desire to employ a signal or alarm, which willbe actuated when the valve 7 falls or is released by the vacuum, andwhich alarm or signal may be of any suitable construction and actuatedin any desired manner. As here shown, I have provided a signal 15capable of being actuated by suction,

which communicates with the cylinder. I preferably desire to place alnanually operated valve 1G in the pipe G in order that thecommunication from the vacuum tank 3 to the cylindrical chamber' Il; maybe controlled, since it will be apparent that when the vacuum 4e fallsor is below the desired or predetermined point, the alarm .l5 would beconstantly actuated, unless the communication were cut oil.

lVhen I desire to bring the device into operation and the vacuum hasbeen created in the tank 3, I open the valve 16 and elevate the valve 7by hand to bring the same against its seat, whereupon the suction of thevacuum will hold the valve to its seat against the tension of the springas long as the predetermined vacuum is maintained. If, however, thevacuum decreases, the spring or its equivalent means, will draw thevalve from its seat, and the movement thereof will actuate the alarmsignal and call attention to the decrease or fall of the vacuum. In theconstruction illustrated, as soon as the valve 7 is removed from itsseat, suction is created within the cylinder 4L, which will actuate thealarm signal, as previously stated. The tension of the spring isadjusted according to the degree of vacuum at which the alarm is to beactuated. It will be further understood that any means which willaccomplish the same results may be substituted, or employed, for thespring described, and that any audible or visual alarm, arranged to beactuated by any means, at the proper time, may be employed.

Other modes of applying the principle of my invention may be employedfor the mode herein explained. Change may therefore be made as regardsthe mechanism thus disclosed, provided the principles of constructionset forth, respectively, in the following claims are employed.

I-Iaving thus described my invention, what I 'claim as new and desire tosecure by Letters Patent, is

1. In a device of the character stated, a chamber provided interiorlywith a valveseat, an exterior suction-pipe open to said seat, a valvefitting said seat and having means for opening it against the suctionthrough said pipe, and an alarm-signal communicating with said chamberand adapted to be actuated by suction from within said chamber.

2. In a device of the character stated, a

chamber provided interiorly with a valveseat, an exterior suction-pipeopen to said seat, a valve fitting said seat, adjust-able means foryieldingly drawing said valve from its Seat, and an alarm-signalcommunicating with said chamber and constructed to be actuated bysuction from Within said chamber.

3. In a device of the character stated, a cylinder having a valve-seaton the inside of one of its heads, an exterior suction-pipe open to saidseat, a valve litting said seat, an adjustable spring dra-Wing saidvalve from its seat, and an alarm signal communicating with saidcylinder and constructed to be actuated by suction from Within saidchamber.

4. In a device of the character stated, a cylinder having a valve-seaton the inside of one of its heads, an exterior suction-pipe open to saidseat, an axial tube in said cyl* ind-ei` and secured in the oppositehead of the same, a rod slidable in said tube, a valve on the end ofsaid rod and fitting the valveinder open to said seat, an axial tube insaid cyland secured in the opposite head of the same, a casing on theoutside'of said head, a valve fitting the seat, a rod carrying saidvalve and slidable in said tube and casing and having a threaded Outerend, a spring on said rod Within the casing, a nut upon the threaded endof the rod and bearing against the spring, and an alarm-signalcommunicating with said cylinder and constructed to be actuated bysuction from Within said chamber.

LUCIUS D. COPELAND. Witnesses:

C. D. MOVAY, F. A. NEWTON.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents Washington, D. C.

